What equipment can be powered by UPS in ICU ward?

The equipment in ICU is unclear, but UPS is actually a backup power supply. When the AC power supply is interrupted. In UPS, the battery DC is converted into AC output to ensure that the equipment will not be powered off. What equipment in the ward must not be powered off and needs UPS power supply (to ensure patient safety). How much w should the device display? These data and device descriptions are available. According to the power of these devices, the capacity of UPS can be selected.